import Vue from 'vue'
import VueRouter from 'vue-router'
import Login from '../components/Login.vue'
import Home from '../components/Home.vue'
import Welcome from '../components/Welcome.vue'
import Users from '../components/user/Users.vue'
import Rights from '../components/power/Rights.vue'
import Roles from '../components/power/Roles.vue'
import Cate from '../components/goods/Cate.vue'
import Params from '../components/goods/Params.vue'
import GoodsList from '../components/goods/List.vue'
import Add from '../components/goods/Add.vue'
import Orders from '../components/order/Order.vue'
import Report from '../components/report/Report.vue'

Vue.use(VueRouter)

const routes = [
  {
    path: '/',
    redirect: '/login'
  },
  {
    path: '/login',
    name: 'login',
    component: Login
  },
  {
    path: '/home',
    name: 'home',
    component: Home,
    redirect: '/welcome',
    children: [{
      path: '/welcome',
      name: 'welcome',
      component: Welcome
    },
    {
      path: '/users',
      name: 'users',
      component: Users
    },
    {
      path: '/roles',
      name: 'roles',
      component: Roles
    },
    {
      path: '/rights',
      name: 'rights',
      component: Rights
    },
    {
      path: '/categories',
      name: 'categories',
      component: Cate
    },
    {
      path: '/params',
      name: 'params',
      component: Params
    },
    {
      path: '/goods',
      name: 'goods',
      component: GoodsList
    },
    {
      path: '/goods/add',
      name: 'add',
      component: Add
    },
    {
      path: '/orders',
      name: 'orders',
      component: Orders
    },
    {
      path: '/reports',
      name: 'reports',
      component: Report
    }]
  }
]

const router = new VueRouter({
  routes
})

// 挂载路由导航守卫
// to：代表将要访问的路径   from：代表从哪个路径跳转而来    next：是一个函数，代表放行
// next 函数有两种写法：next()，代表放行；next('路径')，代表强制跳转
router.beforeEach((to, from, next) => {
  // 1.如果访问的是登录页面，直接放行
  if (to.path === '/login') return next()
  // 2.如果访问的是有登录权限的页面，先要获取token
  const tokenStr = window.sessionStorage.getItem('token')
  // 2.1如果token为空，强制跳转到登录页面；否则，直接放行
  if (!tokenStr) return next('/login')
  next()
})

export default router
